Trigonometri

Question

(Sinx) / (1+cosx) = a

Cot[x/2] =? a cinsinden

Answer 1

İpucu:

$$a=\frac{\sin x}{1+\cos x}=\frac{2\sin \frac{x}{2}\cdot\cos \frac{x}{2}}{1+2\cos^2 \frac{x}{2}-1}=\frac{2\sin \frac{x}{2}\cdot\cos \frac{x}{2}}{2\cos^2 \frac{x}{2}}=\tan\frac{x}{2}$$